wannacry | 9a99cfd3b792f08aca555bd4486d6c402a7091640ff851b9000f4e07955e513d

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 00:49

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General

Target

d75c541d0472028e2959890f9f41e270_JaffaCakes118.dll
Size

5.0MB
MD5

d75c541d0472028e2959890f9f41e270
SHA1

354e644965b49fc9fc9c89336f77818420535558
SHA256

9a99cfd3b792f08aca555bd4486d6c402a7091640ff851b9000f4e07955e513d
SHA512

dec0c5f145fe52a5de1e45781c2d58a16c63d8cd12a084e62f35bbc52cb4e57e9e7c0eb047bcdf600cd401cd814c47d0ebcf1a7aed4d001bbab8a5e8c058c856
SSDEEP

12288:yvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82xi:SbLgddQhfdmMSirYbcMt

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3075) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
4632	mssecsvc.exe
368	mssecsvc.exe
4892	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3120 wrote to memory of 2988	3120	rundll32.exe	83
PID 3120 wrote to memory of 2988	3120	rundll32.exe	83
PID 3120 wrote to memory of 2988	3120	rundll32.exe	83
PID 2988 wrote to memory of 4632	2988	rundll32.exe	84
PID 2988 wrote to memory of 4632	2988	rundll32.exe	84
PID 2988 wrote to memory of 4632	2988	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d75c541d0472028e2959890f9f41e270_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3120
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d75c541d0472028e2959890f9f41e270_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4632
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4892

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
a7bd361b5ada833d31eda6f03a454255

SHA1
7d08ae9d0dcc2d10ba2f91006f2e724e64c30ae0

SHA256
fd12a65fa0e3fb765a22db7c8b538205c99ac16bea247b5f717b36f73ce6813b

SHA512
87fd40c2876eaa0f41c26c4a81bf9ad96c5fdea5e1e6a6894765cbae64f6c9742f28d84fecbeb65772531e3c05f57b0d183c254d40a0b084e7670510374b7b04

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
eb555f071a3b70e1fdda000076bcb32e

SHA1
a2f1fe800e534d64994c0da6b267aad33ceb06b0

SHA256
81602293604804dc3364ba1187ac38086739670c7b397b139756e795b1788260

SHA512
c225529492035506fd2bb583b16e82b8d04d730efa0de09fafb509b1f751f83c580aefae6028476395950cc8be4fae43b66fe66da3e052eb782e8908ef7f70e7

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